132 PHYLLAPLYSIA. 
truncated ; rhinophores tubular, slightly expanded toward their 
apices, slit below. Foot rather broad, truncated in front, scarcely 
differentiated from the integument of upper surface. Gill cavity 
small, enclosed by two minute lobes; mouth longitudinal, furnished 
with two transverse, fleshy lateral processes (pl. 30, fig. 4). 
General ground-color not known, markings consisting of minute 
irregular dots most numerous above. 
Shell (pl. 36, fig. 5) small, claw-shaped, long, thin, glassy and 
pellucid, with iridescent reflections, sculptured with concentric 
growth lines, the nucleus apical, sinus obsolete. 
Radula (pl. 36, fig. 6) seems to have teeth according to the form- 
ula 30°1°30. See above for description of teeth. 
Yokohama, Japan. 
Phyllaplysia punctulata T.-C., Zool. del Viaggio intorno al Globo 
della R. Fregata Magenta, Malacologia, p. 112, pl. 2, f. 3 a, 6, ¢ 
(1874). 
Genus V. PHYLLAPLYSIA Fischer, 1872. 
Phyllaplysia FiscuEr, Journ. de Conch., 1872, p. 297.—Maz- 
ZARELLI, Boll. Soe. di Naturalisti in Napoli, vii, 1898, p. 5, pl. I 
(anatomy). 
Body oblong-oval, much depressed and flattened ; eyes, anterior 
tentacles and rhinophores as usual in the family, the latter much 
nearer the anterior end than to the dorsal slit. Mouth with well- 
developed labial palpi. Pleuropodial lobes arising behind the mid- 
dle of the length, contiguous, the right overlying the left, united 
behind, leaving a very short dorsal slit more or less open at the two 
ends. Foot very broad. 
Shell wanting. Opaline gland diffuse. 
Radula (pl. 9, fig. 26) with the rhachidian tooth tricuspid, cusps 
acute ; inner laterals with three broad, obtuse cusps, the middle one 
largest ; passing outward on the radula the inner cusp increases in size, 
and the outer cusp decreases and becomes obsolete. Mazzarelli 
gives a somewhat different form of teeth (pl. 67, fig. 26). 
Distribution: Bassin d’Arcachon, southwestern France. 
Allied to Petalifera and especially to Notarchus, but the body is 
more depressed, the shell wanting, if we may trust Fischer’s account, 
and the number of denticles of the teeth is less, the cusps of the 
